I dont think weight difference on a 4stroke 115 is that much more than a 2 stroke 115. I may be wrong, but its only 4 cylinders, not a big 6 cylinder like 200hp & up.
I have heard good things about Suzuki 115 four strokes as far as smooth running, long low rpm use, fuel consumption, low upkeep costs, good longevity & they ARE pretty torquey little motors. Not speed demons but, thats not what theyre built for.
'98 Tr20 Triton
'94 Merc 200Xri
92' ChampioN 201DCR Elite