Replace Phaser with CompletableFuture

Question

I have a bunch of methods using Phaser (with always 1 party) and I could replace each method by using CompletableFuture instead. The result would be the same. Are there any hidden benefits when using CompletableFuture?

For example:

version 1 with CompletableFuture:

void queryVersion1() {
    var future = new CompletableFuture<Void>();
    asyncCall(future);
    future.join();
}

void asyncCall(CompletableFuture<Void> future){
    ...
    future.complete(null);
}

version 2 with Phaser:

void queryVersion2() {
    var phaser = new Phaser(1);
    asyncCall(phaser);
    phaser.awaitAdvance(0);
}

void asyncCall(Phaser phaser){
    ...
   phaser.arriveAndDeregister();
}

Which one should I prefer and why? Which one performs better in terms of memory/thread pool/etc.