Transformer question. 45 watt vs 35 watt

[MGW]

This may be a really dumb question, and please let me know if it is, but what is the difference in a 45 watt OT and a 35 watt OT? Sonically (or electrically), how would one react in an express or rocket vs the other?

[martin manning]

Oversizing the OT will generally provide more bandwidth, particularly on the low end where core saturation is a limiting factor.

[MGW]

Makes sense. So I would imagine oversizing the trafo in a wreck would yield an amp that sounds less like a wreck and more like a vox or marshall.

[martin manning]

I think a lot of the 'wreck tone is in the gain structure and the overdriving of the PI and power tubes. KF used big Hi-Fi-type transformers, so I wouldn't think there is much down-side.