What is the actual difference between these commands (particles)

[void lion]

@Override
    public ActionResult onUse(BlockState state, World world, BlockPos pos, PlayerEntity player, Hand hand, BlockHitResult hit) {
        if(world.isClient()) {
            //ArcanistsParagon.LOGGER.info("Scionbloom right-clicked! charges=" + this.getCharges(state));
            world.addParticle(ParticleTypes.ANGRY_VILLAGER, pos.getX(), pos.getY(), pos.getZ(), 0.0, 0.0, 0.0);
        }
        return ActionResult.SUCCESS;
    }

    @Override
    public void onEntityCollision(BlockState state, World world, BlockPos pos, Entity entity) {
        if(!world.isClient()){
            (other code here)
                    }
                    else{
                        ServerWorld server = (ServerWorld) world;
                        Vec3d vec = new Vec3d(pos.getX(), pos.getY(), pos.getZ());
                        server.spawnParticles(new DustParticleEffect(new Vector3f((float) 30/256, (float) 30 /256, (float) 30 /256), 1.0f),
                                pos.getX(), pos.getY(), pos.getZ(), 20, 1.0f, 1.0f, 1.0f, 0.0f);

                        server.playSound(entity, pos, SoundEvents.BLOCK_BASALT_BREAK, SoundCategory.PLAYERS, 1.0f, 2.0f);
                        world.setBlockState(pos, Blocks.AIR.getDefaultState());
                    }
                }


            }
        }
    }

this is my code, and both work fine

what is the actual difference between clientside particle rendering and serverside rendering? I'm using clientside in the onUse and serverside in onEntityCollision correct?

[crystal ingot]

You should prefer client side when possible. It gives you more control over the particle. The server side option also causes a packet to be sent, which can cause issues if it happens really often