Any problems mixing high wattage speakers with low?

[Gasp100]

I have a new speaker coming in and instead of selling the old I'm going to get a 2x12 and plan on using a Scumback H55 + Celestion Greenback to see how that fairs.
The Greenback is only 25 watts and the Scumback is 100, both 16ohms.
Any issues doing something like this?
I guess any way you slice it the total wattage is still 50 watts, right?

[FFTT]

Sometimes a blend like this will work perfectly fine, other times the speaker
with higher power handling may dominate.

It also depends on how much power the speakers are seeing from the amp.

One of those things where you won't really know till you try it.

[amphog]

You double the power rating of the lower powered speaker.