Framing and composing on the Olympus E-P1 vs Panasonic Lumix DMC-G1 – Brian Mosley:
The E-P1, without doubt has a clearer, crisper and more visible LCD than the G1 – it's a fairer comparison to compare it with the G1 EVF, which is similar in visible quality for framing / focusing to the E-P1 LCD.
The advantage goes to the G1 in brilliant sunshine – where the EVF is shielded… although in this situation I'd prefer to be using an OVF.
For all other situations, I much prefer the LCD of the E-P1 – it is more 'open' in that you retain peripheral vision of the scene, and is fast large and clear.
I also think that framing and focusing with an LCD is dramatically less obtrusive than using an eye level viewfinder. This is really a huge benefit for social photography in public – people remain far more relaxed in the vicinity