They are exactly the same !

for continuous problems PSO and for discrete problems genetic

I have used only PSO, CSO, and GA and found CSO provides better than PSO and GA but takes more time.

It is very difficult to answer this question. Based on my experience, I would recommend PSO.

I have used PSO,GA, HS, ACO and BA. Based on my experience BA gives better result than others

out of PSO,GA, HS, ACO, simulated annealing, grey wolf and BA, it has been shoen BA performs better for standard test function. you can look into bat mulitibjective paper by Xin she yang. 

I've compared CSO, PSO, GA, Evolutionary, Sim. Annealing, AFSO and VNS algorithms in the School Timetabling Problem. I found CSO to be more efficient.

Also check the following:

http://ijcsi.org/papers/IJCSI-8-3-2-498-510.pdf

Its depends on the type and complexity of the problem...

https://www.researchgate.net/publication/297245624_Particle_Swarm_Optimization_Algorithm_and_its_Codes_in_MATLAB

Research Particle Swarm Optimization: Algorithm and its Codes in MATLAB

https://www.researchgate.net/publication/296636431_Codes_in_MATLAB_for_Particle_Swarm_Optimization

Code Codes in MATLAB for Particle Swarm Optimization

https://www.researchgate.net/publication/280244004_A_comparative_study_of_metaheuristic_optimization_approaches_for_directional_overcurrent_relays_coordination

Article A comparative study of metaheuristic optimization approaches...

I have compared both PSO and GA in one of multi-objective optimization problems. I found that the computational time of the GA is higher than Particle Swarm Optimization (PSO), and the convergence is slower.

Dear,

You can check the following article :

A Comprehensive Review of Swarm Optimization Algorithms

PLoS One. 2015; 10(5): e0122827.

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4436220/#!po=0.462963

An interesting questions. As a researcher, trying to solve a problem using all the stated techniques would be better. This would give you options on which are the best and which to use at a particle situation.

Best regarda