LaLa DX vs LaLa Magazine

I've recently found an online store that sells manga magazines from Japan for a decent shipping rate. The store is called Akadot. Anyhow, so I bought bought LaLa and LaLa DX not knowing the difference (apparently the sellers I contacted didn't know either). Anyhow, so here's the difference that I can detect (without having translated anything): LaLa DX is a compilation of one-off stand-alone stories and special stories from running or completed series and LaLa is mostly a compilation of manga series, although, there is the occasion one-off stand alone story.