Of course @OptimisticMonkey! So I’m not sure if Licensees have earlier access to a 5.1 version, as they’re likely to release them both at the same time due to Lyra being the showcase project. If your company contacts UE personally it may be different, but it would be unlikely for the gap to be longer than a few days.
It’s going to be slightly different from the 5.0 version, but it should only be different in areas that is showcased as new in 5.1. if the project has already begun it may be a better idea to simply look at the new features in 5.1 and take what is desired instead of the entire thing.
Hope that helps!