Well of the two, the spider is the more friendly companion.
You know, for a beast master ranger, that spider is truly awesome. But ugh. That thing is too creepy. I hate spiders.
And no, that spider is not friendly or is definitely pretending to be friendly. There's WAY too many accidental deaths from the spider jumping and landing on my characters or others. Fool me once, shame on you. Fool me twice, shame on me.