We have our application running in 3.0 SDK. Now would like to leverage the spark skinning in our project. Instead of Changing all the components to spark, we thought about chaging only a few, keeping the other components same, Would it create a performance hit? If not now, in future we might change all the components to the spark, but that is a doubt. Please let me know the pros and cons for this approach. Our project is huge to change all the components.
From below link, you will get interesting information for that.
Ya there are few change which must be consider for migrations. For example font embedding style change, namespace change.
Also you will get some basic information from my blog.