FWIW i have had (TSEK) or have all 3 (710 and 806SD2) and have carried/used them a bit also.
imho the AFCK and TSEK are the same thing, only the hole vs stud seperates them.
the 710 is a great knife, was my first axis, great blade shape, good ergos, shorter than a AFCK/TSEK in OAL w/the same blade length.
is a good knife, but i prefer the AFCK, just fits my hand better, looks better to me, imho the BM AFCK is one of the all time greats, i have 5 now, a mini AFCK11, a proto AFCK11, a 800BT w/154 steel a 800S w/ATS34 steel, and a 806SD2, my fav production knife, obviously.
i sold the only TSEK i have had, just like the AFCK better, they look funny to me w/out the hole, and have had 2 710's, one std and one proto, swapped the std, still have the proto, but, imho for everyday use, ya cant beat a AFCK, be they axis or liner lock, they RULE
out of the 3 , i would choose the AFCK hands down every time!!!
greg