Deca almost always has progestinic sides and it almost never clears the body quickly. NPP is better for clearance rates but is rare.
EQ is test based, will have a lower incidence of sides in most users, red blood cell count is not an issue if you are trying to grow, you are unlikely to ever actually experience any clogging of the arteries from having too many red blood cells, otherwise elite athletes would have significant issues.
BP sides occur more from heavily androgenic compounds and any BP issues from EQ or Deca would be most likely related to fluid retention effects.
Gains will not be as good as deca, but will be more solid tissue, Deca tends to grow tissue like estrogens do, mostly volumization and hypertrophy by fluid and nitrogen. Very useful actually, but simply a different method of growth. If you want progestin based growth you use tren. Deca is outdated.
Youre anabolics like deca and EQ are for creating an environment where tissue grows easily, they are the potatoes to your other cycle meat.
Deca dick is from elevated prolactin and can be dealt with easily using a dopamine agonist.