Valjhun,the answer of your question can not be supported with exact criteria,but feelings which depend much on functionality,esthetics and the number of samples seen from different regions in past.Trabzon arms are more functional, Turko-Caucassian influenced hilts,curvatures,fullers everything are appropriate to and come after the functionality of the blade,which is produced mainly for real fighting in a tough geography of mountains,dense forests and fierce sea,little soil suitable for farming,feodalism, piracy,bandits,enthnical fights and Turkish sytle vendetta (except the very funny style of the Black sea yataghan). Blade makers in other regions have adobted some characteristics like hilt style in time (but still with nuances like in your bichaq) , or makers of Trabzon area have migrated to other regions for better living,but the production purpose is more decorative and accessory.If need to summarize my opinion ,I guess they can have more exaggerated,a bit feminine or not terrorizing like the ones from Trabzon but looking reasonless? curvatures,sometimes more decoareted,nielloed silver pieces,corals etc..Just feelings.
I post the pictures of similar Trabzon arms I have accumulated in the last few months.Meanwhile just message me whenever you wish to sell your Trabzon short sword
