Let's put some numbers to this:
If a bag of Continental Pils is 55 lbs @ $70 = $1.27/lb
and a bag of Briess Pils is 50 lbs @ $42 (~40% less) = $0.84/lb
Using 10-15 lbs in a 5 gallon batch, that comes to $4.30-$6.45 per batch.
For me, an extra $5 or so is worth it for the highest quality / most traditional ingredients.
In an IPA, you wouldn't use Fuggles instead of Simcoe/Nelson/Mosaic/etc. just to save $5, would you?
Bottom line - since you're unsure of the value, buy a bag of each and brew with both. Compare and judge for yourself.