K
Knivesandreels
I believe they made the 562 available with Elmax. With how soft most companies run their Elmax, you can expect some higher toughness compared to the other alloys used on the model.
Ideal for Elmax wear resistance is 61-62, and most companies run theirs between 58-60. Some go even lower, though not often.
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As far as sizing goes, I loved my 940 and 940-1, as well as my 562, and the 450 was too small for my hand. Though it is the same size as the 940, the handle has some added shaping and ergonomics that don't line up with my hand as well as the more neutrally based 940.
ETA: If it were my dollar, I would look for a non bearing based pivot (one current ZT is washer, afaik, as well as 90%+ of the Benchmades).
Bearings on soft Ti do not like lateral loads, and may cause issues with the bearing denting the Ti bearing race. I have not seen this happen much, but if it is a possibility, I would attempt to limit it. Especially if the knife is used for things other than knife stuff (cutting)...