The 936/888 is far behind the other Hakkos and Metcals. The heating element isn't incorporated into the tip, and the tips themselves aren't machined as precisely. There's also fewer tips available, though it's mostly missing the really oddball tips. Iirc, one popular drag solder tip (hoof?) doesn't exist in that line, but overall the selection is still pretty good. In terms of soldering, there's a rather large margin. In my bed of nails test, the Metcal finished in 15 seconds vs 25 for the 936 (very similar to the 888) and the result wasn't as good. Other qualities, such as precision, are similarly behind. It does drop temperature faster while soldering, and is slower to recover, but it keeps a very stable recovery temperature. Also consider that the longer you apply heat, the more it dissipates (causing even less precision) and the higher the likelihood of breaking something. Still, it's perfectly adequate.