really depends on the engine he's buying. An FE can easily be as smooth and as driveable as any small block in a comparable state of tune. A larger displacement engine can deliver the same power at a lower RPM - means a milder, more reliable package. If weight is a big issue, an aluminum FE is now readily available and renders it pretty much a toss up.
As far as breaking driveline parts - that's up to you. I can put together a motor that can break most anything...
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Survival Motorsports
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Engine Masters Challenge Entries
91 octane - single 4bbl - mufflers
2008 - 429 cid FE HR - 675HP
2007 - 429 cid FE MR - 659HP
2006 - 434 cid FE MR - 678HP
2005 - 505 cid FE MR - 752HP