Fix comparision of identical snapshots

Closes gh-35860

buildSrc/src/main/java/org/springframework/boot/build/bom/bomr/version/ArtifactVersionDependencyVersion.java

@@ -16,6 +16,7 @@
 
 package org.springframework.boot.build.bom.bomr.version;
 
+import java.util.Objects;
 import java.util.Optional;
 
 import org.apache.maven.artifact.versioning.ArtifactVersion;
@@ -79,7 +80,8 @@ class ArtifactVersionDependencyVersion extends AbstractDependencyVersion {
 	public int compareTo(DependencyVersion other) {
 		if (other instanceof ArtifactVersionDependencyVersion otherArtifactDependencyVersion) {
 			ArtifactVersion otherArtifactVersion = otherArtifactDependencyVersion.artifactVersion;
-			if ("snapshot".equalsIgnoreCase(otherArtifactVersion.getQualifier())
+			if ((!Objects.equals(this.artifactVersion.getQualifier(), otherArtifactVersion.getQualifier()))
+					&& "snapshot".equalsIgnoreCase(otherArtifactVersion.getQualifier())
 					&& otherArtifactVersion.getMajorVersion() == this.artifactVersion.getMajorVersion()
 					&& otherArtifactVersion.getMinorVersion() == this.artifactVersion.getMinorVersion()
 					&& otherArtifactVersion.getIncrementalVersion() == this.artifactVersion.getIncrementalVersion()) {

buildSrc/src/test/java/org/springframework/boot/build/bom/bomr/version/ArtifactVersionDependencyVersionTests.java

@@ -97,6 +97,11 @@ class ArtifactVersionDependencyVersionTests {
 		assertThat(version("2.1.2").isSameMinorAndNewerThan(version("2.1.2"))).isFalse();
 	}
 
+	@Test
+	void isSameMinorAndNewerThanWhenSameSnapshotsShouldReturnFalse() {
+		assertThat(version("3.1.2-SNAPSHOT").isSameMinorAndNewerThan(version("3.1.2-SNAPSHOT"))).isFalse();
+	}
+
 	@Test
 	void isSameMinorAndNewerThanWhenPatchIsNewerShouldReturnFalse() {
 		assertThat(version("2.1.2").isSameMinorAndNewerThan(version("2.1.3"))).isFalse();