As everyone has said, you won't go far wrong with either the Squier or the Sire.
The big difference between the 2 is one is active (sire) and one is passive (squier).
If you don't know the difference (apologies if you do) - 'Active' Basses have an onboard preamp which have bass/middle/treble controls like you'd find on an amplifier and are used for quick access tone changes (saves you going to the amp). They require a battery/batteries for the preamp to work. I think the Sire does have a switch to turn the preamp off though, so it can work like a passive bass.
For a first Bass, I'd be more inclined to keep it simple & go with the passive Squier. That Bass just has a volume control for each pickup and an overall tone control. Less controls to fiddle with an just get on with playing!
Hope this helps!