I know both locations fairly well.
Globe is more expensive: approx £90 entrance and approx £120 per half hour wih the girl. Sharks is approx £60 entrance and approx £90 per half hour(rough tranlation from local currency)
There are normally 30-50 girls at Globe, and between 50 and 100 on duty at Sharks, depending on the day and time of day you visit.
All of the girls at Sharks will be stunners (thoulgh lots of silicone) and about half at Sharks will be very attractive, the balance OK ish.
Quality of service and time in the room at Globe is guaranteed. The girls are very tightly managed. Sharks is a lottery; how good are you at selecting a girl who will keep her promise once you get into the room?
At Globe there is constant entertainment: every girl has to do at least three "pole dances" (which consist of bored looking strolling round the pole on a fully lit stage, but at least you get to inspect the goods) and regular live porn shows on various days. Tuesday is also public fucking day and there are three fully naked days. Full details on their website.
Sharks you make your own entertainment, and every day bar Tuesday is a naked day. There is little or no public action at Sharks.
The ambient lighting is better at Globe; I find Sharks very dark so it is hard to see the girls properly.
Food is average to OK at Sharks, but a poor choice of free food at Globe. However if you are prepred to pay, their in house restaurant is very good.
If it is purely stunning girls you are after, then probably Globe for quality, though Sharks wins hands down on quality.
If you are young enough to do several pops in one visit, I would recommend Sharks for the quantity and variety of girls available. If you are older and, like me well into my 70s, and can now only manage one pop per night, I'd go for Globe.
Hope this helps.