IF DONE PROPERLY, oil evacuators can be better!! In theory, a good oil "sucker" (as I call it) creates a vaccum in the engine helping to pull a lot of residual oil down off cylinder walls ect. ect.
I wondered which was actually better, till one day a client had her drain plug completely rounded off by "Jiffy Lube". I used my oil extractor first, then worked the drain plug out. When the drain plug finally came out, not a single drop of oil fell out. So in my opinion, extractors work really well.

There are a two things to remember though for best results: #1 You need to start with a good extractor. Niether of the ones you pictured look like they're worth a damn. I imagine the best ones work off of compressed air. But this is coming from a guy who has never used an electric one. #2 the oil must be pretty warm before you extract it, just do it after getting home from a normal drive.

I'm sure people could debate this for a while, but my oil extractor has been great for the last five years. It's really best used when I have multiple jobs to do on a vehicle. I hook the extractor up when the vehicle is warm, leave it on while doing other jobs, and then replace the filter and fill it up before I go. one little bonus is that if it's left on for over twenty minutes, the oil filter comes out nice and clean -not dripping all over everything.

I own a 5 1/2 gallon extractor made by CP from harbor frieght.