They were, all things considered, two peas in a pod
I’ll happily agree with that sentiment if you can explain to me how your metaphor applies using direct quotes from their own writings showing a shared perspectives on shared topics and other elements of clear and obvious consistency of thought and vision. Objectively, this is the only possible respect in which they might be two peas in a pod, that is to say, if on examination their writings overlapped considerably.
Since otherwise it would be a pretty strange pair of peas in a pretty strange pod, considering St. Gregory and Thomas Aquinas beloning to different churches and different religious orders, professing different vocations, living in different places, speaking different languages, living in different eras (Thomas Aquinas died 22 years before St. Gregory Palamas was born), with different understandings of what constituted a theologian, different creeds (Niceno-Constantinopolitan Creed modified with filioque contra canon 6 of Ephesus vs. unmodified Niceno-Constantinopolitan creed), different beliefs concerning the hierarchy, different vocations, different beliefs concerning the propriety of ecclesiastical violence, vis a vis the burning of heretics, different beliefs concerning whether or not grace is created or is an uncreated energy of God as the Orthodox Church has taught since at least the fourth century (we can see this doctrine in the writings of the Cappadocians), who were writing for different purposes, Aquinas endeavoring to create a systematic theology, which was at the time a novel idea, the standard of the era being dogmatic theology such as the
Exact Exposition of the Orthodox Faith in the
Fount of Knowledge of St. John of Damascus, the
Faith (which is somewhat of an epilogue to the
Panarion*) by St. Epiphanios of Salamis in Cyprus, while St. Gregory Palamas was writing to defend the Hesychast monks on Mount Athos from false accusations by Barlaam that they were deluded heretics.
Thankfully, St. Gregory Palamas won, which is fortunate, because it led to the preservation of Hesychasm and the ancient traditions of Orthodox monasticism as documented in the
Sayings of the Desert Fathers, the
Lausiac Paradise and the
Philokalia. Barlaam, despite not having been excommunicated, left the Orthodox Church and converted to Roman Catholicism following his defeat at what we now refer to as the Palamist Synod.
*This work I highly reccommend; it translates to “Medicine Chest” in the sense of first aid kit, and rather delightfully likens all heresies to various noxious pests and venomous critters, making St. Epiphanios an exterminator of heresies rather than heretics, since one does not end a heresy by burning heretics at the stake in an auto da fe, something Thomas Aquinas expressed support for (and which ironically goes against the original mission of the Dominicans as set out by St. Dominic Guzman, which was to convert heretics, not kill them), but by exposing the heresy in all of its stupidity so as to discourage future people from falling victim to the cult**
** This process that has been demonstrated by the relative success of exposes against Scientology in drying up their pipeline of new victims, and has forced David Miscavige to result to aggressively soliciting donations from existing members to purchase high-value commercial real estate outright, ostensibly for the increased exposure, but really, these facilities, one of which is in my hometown and consists of two massive buildings sharing a large parking lot that never has more than a half dozen cars in it, are being purchased and improved with the funds of the members because they appreciate in value as a result of the improvements being performed on them, which would make them very attractive office space if ever the ”church” decided to sell them, and since the money is being raised for them through new donations, Miscavige can also liquidate the existing properties, some of which are in areas which have now become bustling retail districts and have appreciated considerably, and in this manner what he has actually done is secured a pipeline to keep the cult in business even with greatly reduced membership. Conversely, attempts by well-meaning governments in Europe and Australia to ban the cult have mostly backfired, by increasing interest and also allowing Scientologists to play the victim and set up front organizations ostensibly concerned with religious freedom.