Do you have a training contract, if so- what does your firm say? What options do the two courses offer and which do you prefer?
If you already have a training contract, provided your firm does not have a preference there will be little between LPCs- by the time you look for another job (at the earliest for an NQ position) no-one will worry were you did your LPC, rather it will be the experiences you gained during your seats, and perhaps rather unfairly where you did your law degree (at least this was my Sister's experience). If you haven't got a training contract I can't see how the prestige of one course will assist you greatly- unlike law degrees/masters the perceived differences between different LPCs/BVCs are minimal.