No contest, the 914 is lower level than V12E2. For Falken the comparable model is the new FK510, you can try to check that out also coz it's newer and might be even better than the V12E2 but maybe at a slightly higher price. Until this FK510 comes, the V12E2 is still the best value for money now.

Should not be too much difference, maybe just a bit faster wear. I'd say it should last at least 40-45k km minimum.