This isn't even a question. One was a legit contender, with a resume that's a bit thin for ATG status but nonetheless decent enough to confirm he was actually one of the top fighters in his era. The other hasn't beaten a proper journeyman yet - he's won two Olympic golds and beaten 14 jobbers. And the Olympic golds don't mean all that much - plenty of Olympic gold medallists have done nothing special as pros.
Jalolov is unproven, so it is logical that we choose Vitali, I no longer have a high opinion of Jalolov, who persistently wants to fight at the Olympic Games, fighting with immature fighters who have no professional experience, Vitali by TKO...
The version of Jalolov we've seen in the pros? VK all day and twice on Sundays. If you mean a hypothetical version of Jalolov who turned pro much earlier during his actual prime? Different story...might still favor Klitschko but not by as much of a landslide.
Sometimes I just dont know what to say. You mean a decorated World Champion, a H2H monster, held a title for many years, with one of the highest ko percentages of all time, among the greats of the sport. And you want to match him up against a fighter, whose biggest win was against Shevadsomebody (no disrespect intended)? That alone should be enough for a ban
I'm not convinced on Jalolov at all in the pros, I reckon current Joyce would still spank him around the ring like he did in the amateurs. I'd even give Teremoana odds to beat Jalolov in the pros. He has done barely anything, and still doesn't look like he wants to actually challenge himself at all, he is happy to be the big fish in the amateurs and doesn't want to be a little fish again so is happy KO jobbers. Vitali would put him in pieces.