Aside from being heavily leveraged, SFY has a forward P/E nearly twice that of SN, has seen 13 analysts pull down next year's estimated earnings approximately 10% below this year's, and is selling certain properties to get the balance sheet looking better. Superior value? IMHO not close.
The forest is the balance sheet. The quarterly reports are the trees. SFY has a market capitalization of $592M yet has net tang assets of $1072M. SN has a market cap of $1120M and net tang assets of $845M.
SFY has stable management with large stake in the equity.
SFY's leases are mostly in the gassy portion of the EF. In addition, until they can sell some more of their gassy assets in other areas, they are heavily leveraged. If oil and gas pricing stays firm, they would be probably be undervalued; but if prices drop the leverage could be problematic.