talismans vs end game buffs
 

checking out the wiki it looks like the only talisman that is equal in potency is talisman of the raptor ( gives 60 dex, the same as mortal defness)

do the rest of the talisman buffs really give significantly fewer stats or is it just wiki inaccuracy ?

There are lots of oddities with stat buffs. For example, the difference between Strength & Maniacal Strength? one str. to be fair, it lasts 30 min longer.

But yes the wiki numbers are correct. However, they are still useful.