Is a spider's venom the same as a snakes venom

Venoms vary widely between different species of snake and different species of spider. Some of the main types of snake venom are:

Hemotoxic Venoms
These venoms attack the cardiovascular system, circulatory system and muscle tissues, thus directly leading to heart failures. The 'crotalus adamanteus', notoriously known as the western diamondback rattlesnake, uses this deadly venom to make it's prey more pliable. This venom causes the poisoning of blood and affects the blood clotting mechanism to such a grave extent, that the victim can die of internal bleeding. Usually, no pain nor any other symptoms can be observed for almost 1-3 hours (sometimes even 8). This makes it deadlier, as the victim is usually beyond medical help, by the time the cause is even ascertained. The effects of this venom can be seen as lethargy, headaches, nausea, vomiting, etc. The most scary observations of the outcome of a snake bite of this kind are bruising or blood spots beneath the victim's skin. In extremely bad cases, blo