Better?
Serve:extra leverage(.5in) benefits are mostly shown here w/ 7g, Redondo low powered really need good weight transfer and technique
Groundstrokes:control and placement to redondo, power to 7g and 2handers will welcome the additional .5in yet never found a problem w/ the 2hands and standard length redondo
Topspin:neither are topspin machines but if had to pick one would say 7g
Slice:redondo due to the additional flex and buttery feel
Volleys:redondo for sure w/ more versatility and feel, but 7g for more pop
Power:7g
Control:redondo
Feel:redondo, 7g is "different" but you get accustomed to the "shaker" feel of the kinetic tech
Comfort:both comfortable(7g is extended 5g which very well known for its comfort, same time redondo has flex in 50s)
I have never used the redondo 98