I know im biased but here is my take...
In Germany Pep took over the dominant side, bought all the leagues best players. Klopp built a team and made Pep look like a cunt.
In England Pep took over the dominent club and outspent everyone in the league. Klopp meanwhile built a team and is yet again making Pep look like a cunt.
Who is the best manager?
The argument of net spend is only relevant if the discussion is on which club actually operated the best. Managers can't control how funding is available for the club so its a silly argument to bring up if the argument at hand is which manager is the best.
Personally, Klopp for me is the superior manager at this point in time. But I'm not going to beat around the bush and pretend he made a silk purse out of a sow's ear. Both managers had a substantial amount of wealth at their disposal. Kl