Muller choke tubes

[elktrout]

I have two Muller choke tubes (Invector DS for 12 gauge Browning O/U) that came with the gun when I bought it. They appear to be the Muller featherlight tubes, one modified and one full. Are Muller's better, worse, or the same as Browning's Invector DS factory tubes?

 

[cdb1]

I believe they are quite a bit better than factory Browning chokes-based on a number of articles I’ve read over the years.