Insta360 Ace pro ( like the competitors DJI Osmo Action 4, GoPro 12 ) are ruggedly built action cameras and good esp for sports and action videos and waterproof to a certain depth, can tahan elements and knocks and falls. Digital stabilisation is sophisticated though involves video cropping.
But image quality wise I believe the gimbal stabilized Osmo Pocket 3 with their larger 1 inch sensor is better. However it is mechanically more delicate and NOT going to withstand rough handling and rain, does not stabilize the Z axis and needs technique and probably some post editing.
If there is no need for rough handling I would just get the Pocket 3. ( If getting one remember to buy screen protectors )