The biggest differences come down to language, color, and price
It provides card draw, +1/+1 counters, and life, and gets cheaper the bigger your creatures
They are not immune to market forces, such as highs or lows in supply and demand, so lets go over what some cards have recently done, and what looks good in the future
This would be a hindrance if you didnt have at least two Eelektrik on your Bench and the capability of getting one Energy in your hand
DEFILING DAEMOGOTH Halfway between Wound Reflection and Sanguine Bond, Defiling Daemogoth also comes strapped up with a way to trigger that lifegain and Menace
I wouldnt be happy with this unless it were making four or more mana every turn, since the initial 4-mana 2/4 isnt the best thing to have on the battlefield