Turnpike....I am from Michigan too....and its more reliable, even in the midst of construction, traffic moves....when I have run into construction or problems on Rte 2, its a standstill.....PLus, you can go 70mph on the turnpike and growing up, it was 55, which made them more equal.....take in account slowing down for small towns, its substantially quicker...
But I am not sure I understand the 3.75 hrs....I am from Jackson, MI and it takes 2.5 hours....