T12 in my opinion feels more like C245 , tip is not as close or as thin as C210 .
C210 for small to smallest , C115 for smallest booth great but not really as standard handpiece.
For nearly everything possible without microscope I use C245 - way more power. At microscope I use mostly C210 at low magnification. Have only a T115 clone and one JBC C115 point tip - use it rarely.
C245 = ~5mm diameter & ~55mm tip to fingers , C210= only ~2.5mm⌀ & ~35mm tip to fingers
JBC Tips: check pricing / shapes (JBC Homepage…) C245= ~25-30$ for most common shapes , biggest range , many special tips . C210&115= ~40$ and fewer shapes. JBC tips have one of the best heat transfers but at cost of lifetime and very expensive…
Thin tips live even shorter , ( i use dry soft fabric without force for cleaning & a bit lower temp..).
T12: no competition at heat transfer… at price not too.
JBC Clones &T12 :
T12: Has way more shapes as JBC clones , really a lot , more stable quality after finding manufacturers . Way cheaper (not really but most similar priced JBC clones are trash). Thought it’s easier to produce them cheap.
JBC CLONES: even the best (+12$) JBC clones I tested need 20-50% longer to heat a area. (Pace & most others need longer too, close pricing to pace tips at +12$ , but pace.. offers way longer lifespan for that lower heat transfer - clones not ).
Saw only 3 C115 shapes: 0.1 tip /bendt tip/ knife , for C210 additionally different chisels, mini wave, two horsetoe …. For C245 way more , even few special shapes but some priced too close to JBC ones. All clones with very unstable lifetime , few glow red after some uses , few stop working , others just have not the best plating for long lifetime.
The cheaper clones 3-6$ are often shaped horrible, even with burr….Even more unstable life expectations.
No idea about Ksger , but some other stations for JBC tips with Smps instead of Trafo have noise at solder tip.