Maybe try looking at the quality of each companies resource and how confident each are of securing funding. Sirius is not a speculative stock if you ask me, short of a global credit meltdown they will get their financing no worries. are not anywhere near certain of securing funding.
As I said before, according to Sirius' managing director they are attracting unsoliticeted offers from financiers at "incredibly cheap rates" just so that the parties can get a seat at the table..
Sirius also has 36 million cash in the bank whereas POS has not much at all, so far less chance of dilution in sirius' case.
SIR Price at posting:
$2.59 Sentiment: Buy Disclosure: Held