I've just gone the other way.....
I had a 2003 Suzuki DF50 on a 4.5m Avon Adventure, I now have a 2003 Tohatsu M50D2 on a SR4
Both in approx same condition and hours.
Suzuki was quiet, smooth and very economical. It loved doing 2k revs and pootle up rivers at 6knts comfortably. The hole shot was more of a relaxed affair, and at WoT I'd hit about 28kts
The Tohatsu delivers it's power completely differently, it's instant but very on or off...! It hates doing anything under 3k, and is slightly less economical than the Suzuki......but it puts a grin on my face that the Suzuki didn't..!!! It also hit 34knts with two up on Sun, without really pushing the hull.
Nothing we all didn't know really.?
However....I did have go on Tigga, and was quite surprised with the holeshot.
Would I swop..........hummmm...........nah.
but on a bigger boat I'd prob want to go 4st.