Well the ESP is not a Gibson and the Gibson is not an ESP. There's a reason for that, namely that the companies have different target groups for starters. Gibson is much more aimed at an older, more vintage rock/blues based clientel. People who obsess about traditions. Just look at the pickups, Gibsons have gotten constantly more traditional PAF-like, while ESP loves the EMGs and the SD JB/59 combo.
The current Gibsons LesPauls are very nice IMO and well worth the money, the Gibson standard does sound quite "old" and vintagey IMO.
Of course what I am aiming at (probably towards the end of the year) is to add a Gibson LesPaul to my collection. The ESP however, IMO, is hands down the better guitar for me to use live because of the tuners, the EMGs (no risk of being electrocuted anymore), the volute which protects the neck/headstock joint from possible damage and - not to be forgotten - the WEIGHT.