Topic Build Time for Spine Crawlers
Just for reference, Spine and Spore Crawlers are awesome! They can move (albeit slowly).
Anyway, I find it weird that Spine Crawlers take 50 seconds to build while Spore Crawlers take only 30 seconds, yet overall are more useful? Spore Crawlers can detect, have 100 more HP, are cheaper and have more DPS compared to Spine Crawlers (at least at non-armoured units). This essentially makes Spine Crawlers useless to make besides of course ground defence.
My theory is that for Zerg, defending air early game is much harder than defending ground, so likewise the anti-air static defense is stronger to compensate this (after all, our only anti-air ground unit is absolute rubbish, not including the queen). It's probably also because overall there is less stuff in the air compared to ground, so the Spore Crawlers might as well be pretty strong if they're going to be more situational. Lastly, Spine Crawlers can be used to harass your enemy Zerg player because they do extra damage vs structures (they are armoured) and can be placed on the creep surrounding the hatchery.
Just seems kinda weird though.
Spores are only anti-air, spines are only anti-ground. What's the point of comparing them directly at all? They do entirely different things.
I think the reason for the longer build times and burrow times for spine crawlers is that they can be used offensively, whereas spore crawlers are exclusively defensive. Also, if a spine crawler could be built in 30 seconds then they could be built as soon as you see a push coming, rather than having to plan ahead.
Spinecrawler + Sporecrawler
Defences are separate
Can only be placed on creep
Compensated by being able to "uproot" to a difference position
Forge Required to build (Not accessible after Basic T1 Production facility)
Needs to be powered by a Pylon
Compensated by being both anti-air and anti-ground
Bunkers + Missle Turrets
Defences are separate.
Defences can be built anywhere on the map
Defences can be repaired (at the cost of minerals)
Bunkers can be salvaged.
Bunkers need units inside them in order to be remotely effective