On average, the guy with the angled spotter will be the one asking "where?" The straight spotter will have the target located long before the angled spotter. With brown bears and moose I often sit with multiple glassers looking at distant hillsides for many hours a day and just about every type and quality of glass gets used. Very few angled spotter users are very effective compared to the straight spotter users and a new critter spotted in a new direction/place usually turns into a major cluster for some.
Idahopro and another long-time hunting buddy have shown it can be done (and well), but they are the exception IME.
Well after the end of WW2 lots of very large binoculars began showing up in this country brought home by servicemen.
Mostly German and Jap, and many of them having angled eyepieces.
These were and still are awsome quality optics if in good clean condition.
But today myself and most others no longer use them for a variety of reasons.
The alternative is 2 spotting scopes in a machined fully adjustable bracket.
The scopes used regardless of brand are straight rather than angled because you just cant use the angled ones for that purpose.
As for a group hunting together, and the one using the angled being at a disadvantage, that would be because those doing the directing to a target are poor at doing it.
Regardless of scope used, one hunter should be able to walk the other to the target easily starting from a point both can plainly see.
Both types can have an advantage in some circumstances for long glassing sessions.