Lets talk Grass/Ghost 'mons

Who do you think will be the superior choice? Both have good qualities to them as well as some hindrances

>Decidueye
+Can go either Physical, Special, or Mixed
+Spirit Shackle lets it trap its opponent while also getting a 180 BP Z-Move variant
+Has access to both Swords Dance and Nasty Plot
+Baton Pass, Defog, U-turn, Synthesis, Sucker Punch, and Roost give it great utility
+/- Long Reach prevents Iron Barb/Rough Skin/Rocky Helmet users from punishing Physical variants of Decidueye, though it is a very situational ability
-78/75/100 defensed is very subpar for a Pokemon who's weaknesses are 5 of the most common attacking types in the metagame.
-While better than Dhelmise's Speed, 70 base Speed is in no way amazing itself and will have to rely on Speed IV investment and Speed positive natures, limiting its offensive prowess. -Choice items and Assault Vest prevent the use of utility moves

>Dhelmise
+Gets a damage boost for Steel type attacks
+Unlike Spirit Shackle, Anchor Shot is capable of trapping Normal types, plus gets a boost from Steelworker
+Access to Rock Slide for any Flying, Fire, or Ice Pokemon trying to switch in on it
+Has access to Rapid Spin and can pressure any Ghost types trying to switch in on a Spin
-7/8 of its Grass STABs are Special coming off a base 86 SpAtk with Power Whip having 85% accuracy
-Ghost STAB is also lacking physically with Shadow Claw being its most reliable attack
-Steel type attacks don't synergize well with Grass and Ghost type attacks on an offensive Pokemon
-Steelworker is useless without a Steel type attack
-Giga Drain is its most reliable form of recovery
-40 base Speed means it will almost always go last

I'm probably missing a few points, but feel free to point them out