The SWCP was April/May 2007, Pennine Way was 2005. I am sure you will love the SWCP especially if you get reasonabe weather.

Marazion to Poole took me 23 days, including a day to walk around Portland Bill which is worth it if you have the time. My last day from Swanage to South Haven Point was only just over 7 miles. The good news is that walking it that way you don't have to pay for the ferry to Poole (unless they have changed the system).
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Pennine Way 2005&2014; C2C 2006; SWCP 2007; WHW 2008; GGW 2008; Dales Way 2011; Clev.W 2012; Yorkshire W.W. 2012; Offa's Dyke 2013; Peddars Way & Norfolk Coast Path 2014; Pembrokeshire Coast Path 2015: LEJoG in stages 2018: Camino 5/2019.