Question

Two ways in which spiders different from insect are

Answer 1

What they have in common is that they both have jointed appendages (like legs, which are divided in different segments), exoskeletons, and segmented bodies. They are both invertebrates.
All of these characteristics make them part of the same phylum, Arthropoda (which in greek means jointed foot). 

Their differences:

Arachnids have 8 legs (though they have appendages which could look like legs, such as the pedipalps)  insects have 6.Arachnids have their bodies divided into two parts (tagmata) : cephalothorax (head and thorax fused together) and abdomen. Insects have their bodies divided into three: head,  thorax, and abdomen.Arachnids lack antennae and wings. All insects have antennae and most of them wings.So insects belong to the class Insecta and arachnids to the class Arachnida, both of which are under the phylum Arthropoda.

Answer 2

this the answer how spider are different from insects