Please send me a link to the topic here, for the reason that people can compare my service to other ones. I cannot think that the other service has exactly the same difficulty of 888.446.610.538, has to be a big coincidence... It sounds like you want to weak me, but if that is not true I apologise even now.
One factor of my price is the very high security I want to provide, therefore I think it is appropiate to have a higher price then others. If my prices are too high for you, I could think of lowering the price a bit, but you could also get your vanity address from the other person who provide this service.
Wish you a great day. In the future please leave only a constructive comment, if you want to get a vanity address.
The chance that it is the same difficulty isn't that low, as there are many characters that give the same difficulty as others. The thread is
Pretty Addy Giveaway, and you can see the post where someone bought 1Sweeet for 0.0076
BTC, using split key (same security)
here. I loaded vanitygen myself to see the difficulty (which you should too, if you don't believe me), and it was the same. I didn't want to link it was linking a competitor would probably be bad. Difficulty changes by prefix, not service.

Vante.me also offers 1Sweeet, generated via split key, for 0.018
BTC.

I don't need a vanity address, as 1DarkStar would be too expensive for me, and I run vanitygen myself for easier prefixes (than 1DarkStr), but I'm trying to help you as your rates are a lot higher than your competition.