I'm not saying that Manu can't be effective; with the pace he's got he certainly could be and I don't doubt that he could chip in with the odd break-away goal here and there but it's not just about pace. It's about movement, vision and awareness of what's going on around you and so far Manu...
Baldock is a MUCH better player than Manu will ever be; Baldock has a footballing brain, Manu does not.
I honestly can't think of any occasion (when both fit and available) that I'd choose Elvis over Sam.