What's "better" mean? I suppose you could argue he's technically better (I don't know enough about music to know), but he's generic -- which is precisely why EVH recruited him. And not remotely in the ballpark as a showman, nor within a mile as a unique voice. Also, except for "Right Now", their post-Hagar music was crap compared to the DLR VH.
I'm being kind at the moment; I have several posts on other threads offering much more pointed views on this topic. The Hagar for Roth trade was arguably the worst in popular music history.
Lots of people are wrong about lots of things :)