A: Yes, because different baits and lures all have different weights and aerodynamics, so you might need to adjust your fishing reel to make it more suitable for the lure to work effectively for your target fish
Getting fish to eat based on hunger often (although not always) involves trying to use lures or baits that closely mimic what they are eating in a certain area
Bait Profile: Think like the fish
ZAION-V is more easily machinable than their standard ZAION material, allowing a wider range of their reels to enjoy the benefits
And lastly the Revo SX seems to have a Micro-Click Precision Drag Adjustment, so each turn of the drag star enables you to make more precise adjustments
Beyond that, simplicity, the master cylinder design, my preference for mineral oil, full rebuild-ability, and two-pistons rather than four