Both know at least 2 languages. Nasser has been reported as knowing 6+. I know Milos knows at least 2...could know more but I don't have that info however. 
Milos- Owns his own gym 
Nasser- been kicked out of many gyms
Milos- does giant sets and is detailed beyond belief
Nasser- does bent over rows that look more like shrugs, had even worse case of synthol than Milos, yet denies it. 
Milos- likes to set the record straight, using very precise details. 
Nasser- likes to stir the pot, make up far fetched stories, and laughs but never corrects himself. 
Milos- earns his income through the gym, merchandise of gym clothing. 
Nasser- sells soiled underwear, suits, and whatever else a male schmoe will buy. 
Milos- can still step on stage at this moment. 
Nasser- needs a full 12 week or more to prep for a show, and will still look like shit (did in his last 2-3 outings)
Milos- "only" weighs 230 or so....
Nasser- might weigh 300lbs, but he still looks like a sack of shit that fell off the shit wagon. 
I think I know which person I would believe...in any aspect of BBing, life, or issue.