Could be many different reasons, may be she just didn't click with a client. Everyone has a different perfect 10. If she has only those two reviews you might want to wait a while to see if more positive reviews are posted, unles you are willing to TOFTT.

You have to read the detail reviews. My guess is that the bad one will tell you she wasn't the girl in the pictures, bait and switch, upseller, etc. The good one might have been a fake to get her started. Then you determine by their review history which of the reviewers is more likely to be telling the truth.

I'm speculating of course, but that is usually the case when you see that big a disparity with only 2 reviews.

read the reviews, you need to consider that everyone does not bring their "A" game each time.  Also, the guy could be a "low scorer".  With that in mind, if a lady has 10 reviews, discard the low and the high and look at the rest; similar to judging in the Olympics.

It's impossible to form an opinion on a lady from just two reviews especially when they are that different.  It could be a pimp using different girls with the same name.  It could be that the guy who wrote the bad review didn't get something he wanted and decided to flame the provider.  It could be a competitor or former pimp flaming the provider.

It's also very possible that the good review was a fake.

There is another phenomenon at play here. As an example I have noticed that one of my favorites, who has more than 20 reviews, has one that is a 2 - 2. Even if you don't like her type, she's still at least a 7 on appearance and I think she's at least an 8. It seems that when some guys are disappointed with the service the take it out on the lady in terms of appearance.

MH50

This is the reason for TER & especially VIP.  It is likely that the first is a fake or shill post.  Once they're found out, they'll rename themselves & reappear again...  

While there is no defination of the exact number of reviews it takes to be a "well reviewed" provider, it's certainly more than 2.

I don't cross off a provider with the rare low review (no more than 1 per page).  I do read that review if I'm interested in her...  to see what went wrong.  Not everyone clicks.

I realize that consistant reviews are not carved in stone...  after all these are the unique pairings of 2 unique individuals.  But I do look for a reasonable range...  if an average of 8, then a +/-1 woould be 7-8-9s.  Actually if I'm interested & I get that far, I'll quick read the most recent page of reviews which is better than a number grade.
skb

Fact is, many people will rate the looks based on their experience with the individual.  I know that I usually do.  I was with a lady that I thought was completely beautiful... until she began acting like a very unhappy person.  I saw the ugly side of the girl.  So, I would have rated her an 8 or 9 at the start, but by the finish, she would have gotten no more than a 3.