Which One Does Better? 336 or 300-250

After recent Adsense changes which size does best

[Erku]

It has always been held here that 300-250 is the best performing size.

However, After the recent google changes. Which one does better for you? Would you say that 336 size does better?

Thank you

[celgins]

Which changes? Google seems to be implementing a few these days.

I like 300x250 and it fits very well within my site's design.

[greatstart]

I use both of those sizes depending on each page layout. Those are the only 2 ad blocks that seem to perform well for me as far as a decent CTR.

As far as which one does better, well they both seem to do about the same.

[alephh]

For me 336 does little a bit better (higher CTR, higher CPC) in the long run, but that's only logical since it's eating away bigger area (which makes it more difficult to fit into your design nicely).