A question between snopt and ipopt

[101709]

I want to know why the same code, with two different optimizers, can end up so different. Ipopt works much better than snopt. Snopt also displays a message that says "current point can not be improved." Because snopt is faster than ipopt, but I can't accept the current gap. I would like to know how to adjust the Settings to make the result of snopt close to ipopt. I have tried to change the step size Here are their Settings:
if args.opt == "snopt":
optOptions = {
"Major feasibility tolerance": 1.0e-6,
"Major optimality tolerance": 1.0e-3,
"Minor feasibility tolerance": 1.0e-6,
"Linesearch tolerance": 0.2,
"Verify level": -1,
"Function precision": 1.0e-6,
"Major iterations limit": 50,
"Nonderivative linesearch": None,
"Print file": "opt_SNOPT_print.txt",
"Summary file": "opt_SNOPT_summary.txt",
}
elif args.opt == "ipopt":
optOptions = {
"tol": 1.0e-3,
"constr_viol_tol": 1.0e-6,
"max_iter": 50,
"print_level": 5,
"output_file": "opt_IPOPT.txt",
"mu_strategy": "adaptive",
"limited_memory_max_history": 10,
"nlp_scaling_method": "none",
"alpha_for_y": "full",
"recalc_y": "yes",
}
and the results:
Optimizer CL CD
IPOPT 1.02196018 0.25999976
SNOPT 0.89553852 0.24726162
objective: max CL
subject to: CD<=0.26