We're flying from AMS to HNL (connection in IAH and LAX) all on 1 united airlines ticket.

We have a connection of 1 hr 40 mn at IAH. Is that enough time to catch our next flight to LAX ?

Do we need to recheck our bags ? - or what is the correct procedure ?

AMS IAH - Flight:UA21 // IAH LAX - Flight: UA1257

I see that United has another option from AMS to HNL going through Newark.

We would have an 2h 35m connection in Newark. Do you think this is a more reliable option ?