It depends on the nutrients. When I used GH Flora 3-part in soil, I got immediate burnt tips when I overfed. Never any salt build up. When I switched to Grow More Sea Grow, I almost never get burnt tips, but I'll get serious salt buildup if I overfeed for 3-4 weeks.
It seems like the difference is whether it's fast-acting synthetics or slower-acting organics. I prefer the later for soil. I think it's healthier for the soil, promoting microbial action to participate in the availability of nutrients. But, it really threw me off when I didn't get burnt tips.