Well,
I had an Einstein and a Schmidt, could play the VH4. All great amps, especially the VH4 was phantastic.
Of the Friedmans I played the PT, BE100, DS and SB. All great too.
It is a matter of taste - they are voiced different - I would say, Friedmans lean more towards the marshallesque side, while the Diezels have their own thing going on.
You should play them by yourself and decide then - if you are a Marshall guy, go for the Friedman - Be100 is great.
It also really depends, what kind of music you are playing. VH4 is very versatile.
I play the Small Box now, it is a little bit more old school, and, as I said, I am leaning towards the british side.