FYI, I start from Lisbon on 27 April 2017. Once at Porto, I plan to take the central route this time. I last walked the coastal route in 2015.
Once we all reach São Pedro de Rates, we are all on the same route anyway, on our way to Valença. The inland route has more pilgrims, but also more infrastructure: albergues, hostals, cafes / bars, tienda, ATMs etc.
It is a relative degree of difference, but it works for me.
If you see me, you will know me by my distinctive coloration, I prefer day-glo safety yellow/green (see my avatar). Look for the cap. I use two hiking sticks and I wear a 48 L Osprey Kestrel rucksack (green) with a bunch of patches sewn on.
In fact, I am sometimes referred to as the "pilgrim in parrot plumage." Hey, a driver MAY hit me, but he will see me first...and likely die of laughter...
I hope this helps.