First century + 75 miles the day before?

I wanted to ride the MS150 (75 miles a day for two days) and then a
century the week before or after the MS150 ride. However, the MS150 AND
the local century are on the same weekend. It's also my first century
(last year, I did the MS ride, although it was only 60 miles a day, and a
bunch of other 60-70 mile rides). On the one hand, I'm thinking of
ditching the MS 150 so that I can join the century club. On the other
hand, I'm thinking that a century is only another 25 miles (over the 75
I'd be doing for the MS150), so why not ride 75 miles for one day and 100
miles the next?

What think ye?

--
Bob in CT
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