I wouldn't use the term "better" for either one.
For an enthusiast, an inline 6 tends to be easier to work on, smooth revving and overall simpler. The packaging is lot larger for an inline configuration. Generally speaking, you could fit a V12 engine in the same bay as an inline 6.
V6 engines are more compact, more rigid but also more prone to vibrations even with counter balancing shafts.
Just my $0.02
|