The Yamaha would kill the Triumph anyways.
50 ft lbs of torque in the ST.
65 for the Yamaha....and available at super low rpms to boot.
The lacklustre suspension will be plenty good enough for street use. Change springs and oil weight to suit rider, set sag and be done with it.
Do you really believe most of the street ridden sportbikes have any suspension setup at all for specific riders? Do you think those riders actually go faster after a setup? Do you think they can take advantage of an improved suspension on the street. I see guys with Ohlins on their streetbikes and I laugh. I have met less than a handful of riders who would need anything better than stock suspension. I have ridden a pile of sportbikes, on some very technical roads, at a pace that has put smiles on many riders following me....and never touched one clicker, one adjuster, any preload, ride height, never changed weight of fork oil, or one fork spring. I do it to my racebikes, but for a street ridden bike, it's almost pointless.
Most riders couldn't even tell one way or the other.