[Update, June 23, 2015: After this article was first published, Dillon Francis was added to this year's EDC Vegas lineup — making him the only performer booked at both festivals.]

Insomniac Events announced the lineup for the 2015 edition of Electric Daisy Carnival Las Vegas today, and it's chock full of the usual EDC suspects: Tiësto, Calvin Harris, Hardwell, Kaskade, plus a few old-school stalwarts like Moby and Carl Cox. It should be another epic year at the Las Vegas Motor Speedway for EDM fans who like their music bright, shiny and full of drops.

But there are a few names you won't see on this year's EDC flyer. Ninety names, to be exact. Because not a single act playing this year's EDC Vegas is also booked to play this year's Hard Summer.

The EDC Vegas lineup announcement follows — and appears to confirm — an article that appeared in Billboard last week, alleging a deepening rift between rival promoters Pasquale Rotella and Gary Richards, the masterminds behind Insomniac and Hard, respectively. According to Billboard, Richards recently filed a trademark lawsuit over the Electric Daisy Carnival name, which Richards actually first used for parties he threw in the '90s, before reportedly agreeing to let Rotella's Insomniac begin using the name in 1997. Even before the suit was filed, tension between the two rival companies — which, ironically, are both owned by Live Nation — was running so high that, according on one Billboard source, both festivals had begun issuing “booking ultimatums”: “If you play one, you can't play the other,” said the source, an unnamed artist agent.

In the past, this wasn't always the case. Tiësto, for example, played both festivals last year, and Dillon Francis, Claude VonStroke and Flosstradamus, among others, all played both EDC and Hard in 2013. But this year, not a single artist is booked for both events.

You can see the full EDC Vegas 2015 lineup below and compare it to the Hard Summer 2015 lineup here. Who “won” with the better lineup? Since EDC Vegas sold out before the lineup was even announced, it may not matter in the long run. But it will be interesting to see if the Rotella/Richards rivalry, which has now created a clear division between the festivals' lineups, will also begin to split Southern California's EDM fan base more starkly into pro-EDC and pro-Hard camps.

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