I don't have experience with either of those mics unfortunately.
I'm assuming you're going to be a one-mic studio for a while for financial reasons, so in that case, then a LDC will be better for vocals, possibly not so great for acoustic guitar, but you'll find people that like LDCs on acoustic, certainly I've used them myself.
But the other option being an SDC which may be better for acoustic guitar, but I've never heard of anyone seriously using them as a vocal mic...
Do yourself a favour though, whatever you get, read the Recording Acoustic Guitar 101 sticky thread - not sure if it's in this forum or the recording one, but worth a read. Acoustic guitar is not the easiest thing to record.
Hang in there, people drop in and out of here all the time and I'm sure someone with some direct experience of your potential choices will rock along soon.
Luck!