I have a 208 with a 150 2 stroke. 2 vs 4 makes a big difference since the 4 weighs a lot more.
For me and my wife, the 150 is fine. On plane takes about 6 or 7 seconds, cruising speed at 4000 revs is about 28mph or so depending on wind, seas etc. with Bimini up but curtains down That is with the stock 17M prop.
If I have three guys fishing I can feel a significant difference on the time it takes to get on plane. Once on plane, the performance different is less but still noticeable. Remember that the difference between a quarter tank of gas and a full tank is about 360 pounds, easily like adding 2 people. Fishing with three guys and a full tank does noticeably affect performance and handling.
If I were to re-power with a YAMI 4 stroke, I would go bigger, probably a 200 but I would also be concerned about the additional weight on the stern and its affect on the scuppers. It might be better to go with a newer 2 stroke. Hopefully, I won't have to make that decision for a long time.