None of them match the ability to bombard several squaremiles for days with tank-busting firepower,I've seen SW artillery, as in howitzers with indirect-LOS trajectories, in the Clone Wars cartoon. And weren't those AT-PTs, or whatever those walkers were in AOTC, capable of firing projectiles? Hailfire droids can fire from long-ranges too, as can Juggernauts.
Yes, modern artillery is pretty precise. Heck, IoM-Basilisks can hit individual moving tanks many kilometers away with some reliablity.Artillery, precise? Hah
Still nothing to match an equally strong enemy advancing with an armored formation.The Juggernauts in Kashyyk, for one. Hell, the deployment of the droid army in Geneosis. AOTC showed us walkers being dropped from orbit and enterng the battlefield while fighters and LAATs engaged enemies in both air and ground, while SPHAT batteries fired long-range beam artillery on large and hard targets like the Seperatist ships, while clone troopers did whatever, and Acclamator ships came in from orbit to disgorge troops and/or do battle. It wasn't JUST infantry alongside walkers. That engagement showed a whole CRAPLOAD of cohesion in all theaters of combat, from infantry to friggin' starships, from airborne assets to artillery.
The walkers were pretty much a joke - low mobility and with inadequate weapons. Also, they are pretty big targets.
The LAATs are good gunships, but the enemy did not have sufficient AA-capacity and no opposing aerial assets.
The SPHATs are the biggest joke in that assault - they were not even able to support their troops (against the enemy line of battle) on completely flat terrain. They are most likely designed to take out enemy landing crafts and low-altitude starships, but they are nopt artillery in the conventional sense.
Against an equally strong armored guard force, the clonies would have been ripped to pieces.
Most tanks can mount mulit-purpose guided missiles, so you have much better AA-cover. Put in some Hydras and most of your gunships will be shot down.
Your only means of taking out any vehicles aside from the gunships are your AT-TE walkers with their main guns. Due to their relatively small numbers (compared to the size of that army), low ROF and vulnerability (cockpit/joints/unarmored turret), they will loose an armored engagement. Since they also transport troops, you will also loose some of your infantry.
So you are left with your clone troopers, which apparently did not carry that many AT-weapons and thus will get ripped apart by the tanks and then mopped up by the infantry.
You know what, i think i will start a thread about that replacement-battle.