What spider looks similar to a brown recluse?

the brown reclus cause if it bites you your organs can rearrange

...and that's about the most stupid answer I've ever seen.

Actually, a black widow's venom is a "neurotoxin," which means it effects the nervous system of the body. It's meant to completely paralyze their prey, and eventually kills them as well... but the venom is strong enough that it can seriously effect humans. Young children, elderly, and those who are weak in health can easily die from the effects of a black widow bite. The neurological effects include extreme nervousness, jitters, sweating, and aching joints, as well as nausea, vomiting, and extreme fatigue. A healthy adult can usually survive a black widow bite if not treated, but it won't be a pleasant recovery. However, just as some people are allergic to bees and ants, a healthy person could have an allergic reaction along with the other symptoms, which could surely kill them, so it should never be ignored.

There are also cases of plumbers, construction workers, air conditioning techs, and other high risk jobs that run into black widows constantly, that build up an immunity to their bites to the point it's no more than a bee sting to them.

A recluse's venom, however, has more of a dissolving effect. Actually, most Spiders' venom does this, as it dissolves the innards of whatever it's trying to eat, and the spider "drinks" their prey, leaving only the hollow shells you sometimes see hanging in spiderwebs. But a recluse's venom is overkill. When a human is bitten, the dissolving effect can continue to the point of requiring amputation of a limb if ignored, or death if it's not eventually treated, regardless of the health of the victim.

As for which is deadlier overall.... It's literally a matter of "pick your poison..."

Jack Spencer