As the purists says, it is a matter of PERCEPTION.
Which is your perception to VC?
Which is your perception to have one VC vs one ROLEX and one JL?
Most important...how you will feel about this, buy ONE or get TWO?
What makes you happy, do it forward. No matter what.
I Have a lot of respect to ROLEX and to JAEGER LE COULTRE, what they are doing is just AMAZING, they are in the pinnacle of technology development and precision, just for mention the JLC Extreme Lab. This worth the purchase of these brands.
VACHERON CONSTANTIN is in a different stock...VC is in the pinnacle of the super-fine brands, quality finishing, pedigree, magic, etc. Here does not exists the PVD, silicium or other brand new techno materials but exists hundreds of years of the top watch making, the finishing of the movement is second to none and from my point of view, no other company makes so beautiful dials like VC.
But above of this, is your PERCEPTION what really matter.
I am sure that you will be happy with either decision.
Kind regards,
Armando.