You do understand that there is more to Eddie's brown sound than just those two pedals yes? You have his old amp, his technique... .Just a lot of variables.

For what it's worth...

I have both, pedals and a Boss GT100. I like the pedals but there is something magical about the power of the GT100. You have everything you would ever need in on box. I go in and can just experiment for hours on end playing with tone.

There are going to be people who say, pedals sound better, there are going to be people who say pedal boards sound just as good if not better. I'm not going there either. But I will say that I have an Ibanez Tube Screamer pedal and the boss GT10 ( had a gt10 before my 100) sounded just as good, if not identical.

So for me, and take this with a grain of salt, you get a WAY bigger bang for the buck with investing in a pedal board than you will with pedals. Granted, all my pedals ( with the exception of the tube screamer ) are all Boss pedals.