Replying to SLR vs SLR-like

im looking for a new camera to make the step up to SLR. i am looking at the Samsung pro 815. it is listed as a SLR-like camera. what is the difference between the SLR and the SLR-like. from what i found the SLR-like will that the same quality photos as tha SLR. the only big difference is the the SLR-like has a digitally created image in the view-finded rather than the mirror reflected image in the SLR's.

also another question that i couldnt answer is if lenses if onto it. but with 15x optical zoom do i need it? and what about wide angle?

is there anything else more to the difference between them?? and if anyone has feedback on the pro 815 or any other SLR in the "up to" $700-900 range what are they.

the main review i looked at was dpreview.